Update
A full list of the changes:
-Extra garrisons added for an even harder challenge.
-Added in a few new events.
-New map terrain thanks to Repman
-Antioch start with a st johns chapter house.
-Jerusalem start with the templars chapter house.
-Turks given a higher kings purse and they start off with better quality troops.
-New menu music from Kingdoms.
-Loading screen music now working with faction intro's back.
-New regions added Kerak, Danzig and Konigsberg.
-Some improvements to major cities, Kiev is now the most most wealthy city in eastern europe.
-New unit cards from Kingdoms.
-Armoured sergeants added to faction England.
-AI generals now have the better command trait.
-Named characters now start more fertile for timescale 0.5 years.
-Mangonels moved back to the siege works.
-Fortress upgrade level now requires a population of 10000
-Mongol invasion armies spawn in much shorter waves.
-New win conditions for a tougher campaign.
-Rebalanced a few units.
-Brigand rebels spawn even less.
-Money gained from sacking a settlement reduced.
-Fixed a few traits (done by to Rodrigo the scarred).